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    <title>Document</title>
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<script>
    // 将字符串 'cqyzsC012QzAabcd'中的acq(忽略大小写)替换为'你好'
    let str = 'cqyzsC012QzAabcd'.replace(/[acq]/gi, '你好');
    console.log(str);
</script>
</html>